Worcester GREENSTAR 24 Installation, Commissioning And Servicing Instructions page 36

Setting the control panel
SERVICE FUNCTION 3.C: SWITCHING DIFFERENTIAL
Only if automatic cycle block (service function 3.A) has been switched
off will this service function be active.
The switching differential is the permissible differential from the set flow
temperature. It can be set in increments of 1 K. The minimum flow
temperature is 35 °C.
The switching differential can be set from 00 to 30 (0 to 30 K).
Standard setting is 10 (10 K).
SERVICE FUNCTION 3.E: CYCLE TIME, KEEP HOT DHW
This service function only operates in comfort mode.
It specifies the time from completion of preheating or DHW demand until
the next heat-up time for the plate heat exchanger. This prevents the
plate heat exchanger overheating.
The cycle time can be set from 20 to 60 minutes.
Standard setting is 20 (20 minutes).
SERVICE FUNCTION 3.F: DURATION OF TEMPERATURE
MAINTENANCE
The duration of temperature maintenance specifies how long heating
mode remains disabled after DHW is drawn.
The duration of temperature maintenance can be set from 00 to 30 (0 to
30 minutes).
Standard setting is 05 (5 minutes).
SERVICE FUNCTION 4.B: MAXIMUM TEMPERATURE FOR KEEPING
THE HEAT EXCHANGER HOT
The maximum temperature for keeping the heat exchanger hot can be
set from 40 to 65 (40 °C to 65 °C).
Standard setting is 65 (65 °C).
SERVICE FUNCTION 4.E: APPLIANCE TYPE
This service function displays the determined appliance type.
Possible displays are:
• 00: Central heating only
• 01: Combi boiler
• 02: Cylinder temperature sensor connected to the Control unit
• 03: Cylinder thermostat connected to Control unit.
SERVICE FUNCTION 4.F: SIPHON FILL PROGRAM
The syphon fill program ensures that the condensate syphon is filled
following installation or after the appliance has been out of use for some
time.
The syphon fill program is activated if:
• the appliance is switched on at the mains shut-off valve
• the burner has not been in use for at least 28 days
• a change over between summer and winter mode occurs
The next time there is a demand for heat in central heating or DHW
mode, the appliance is held at low output for 15 minutes. The syphon
filling program remains active until the appliance has completed 15
minutes of operation at low output. The display shows
with the flow temperature.
Standard setting is 01: Siphon filling program at minimum heating
output.
Parameter 02: Siphon filing program at set minimum heating output.
Parameter 00: Siphon filling program is off.
DANGER: If the condensate syphon is not filled, flue gas
can escape.
▶ Switch off syphon filling program only during
maintenance.
▶ When maintenance is complete, reactivate the
syphon filling program.
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SERVICE FUNCTION 5.A: RESET INSPECTION
This service function enables you to reset
completing inspection/maintenance of the appliance.
Setting 00.
SERVICE FUNCTION 5.B: FAN RUN-ON TIME
This service function allows you to set the fan run-on time.
The run-on time can be set from 01 to 18
(10 - 180 seconds).
Standard setting is 03 (30 seconds).
SERVICE FUNCTION 5.C: CHANGING THE USE OF THE CHANNEL ON
1-CHANNEL TIME SWITCHES
This service function enables the use of the channel to be changed from
central heating to DHW.
The following settings are possible:
• 00: 2-channel (central heating and DHW)
• 01: 1-channel central heating
• 02: 1-channel DHW
Standard setting is 00.
SERVICE FUNCTION 5.E: SETTING CONNECTION NP - LP
With this service function you can set the NP - LP connection.
The following settings are possible:
• 00: Off
• 01: DHW circulation pump
• 02: External heating circuit pump in consumer circuit w/o mixer
Standard setting is 00.
SERVICE FUNCTION 5.F: INSPECTION INDICATION
This service function enables you to set the number of months after
which (inspection) appears alternately with the flow temperature
on the display.
The number of months can be set from 00 - 72 (0 to 72 months).
Standard setting is 00 (disabled).
This function has already been selected at the controller
if the display shows U0.
SERVICE FUNCTION 6.A: CALL UP THE FAULT LAST SAVED
With this service function you can call up the fault last saved.
The service function is reset at 00.
SERVICE FUNCTION 6.B: ACTUAL VOLTAGE AT TERMINAL 2
The actual voltage at terminal 2 is displayed.
Possible displays are:
• 00 - 24: 0 V to 24 V in increments of 1 V
SERVICE FUNCTION 6.C: FLOW TEMPERATURE REQUIRED BY
HEATING CONTROLLER
alternating
This service function allows you to display the flow temperature required
by the heating controller.
SERVICE FUNCTION 6.D: CURRENT FLOW RATE
The current flow rate is displayed.
Possible displays are:
• 0.0. - 99.9.: 0.0 to 99 l/min in increments of 0.1 l/min
SERVICE FUNCTION 6.E: TIME SWITCH INPUT
The left digit indicates the current status of the heating system. Heating
mode is activated according to the time switch settings.
The right digit indicates the current status of the DHW system. DHW
mode is activated according to the time switch settings.
Possible displays are:
on the display after
6 720 811 922 (2014/07)